Feed mechanism for sewing-machines



2 Sheets-Sheet 1.

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` M. A. DILL'BY.

FEED MEEANISMEOR SEWING MACHINES.

' 4l\o.24".750. PatentedOot. 4,1881.

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("No Model.;l Y 2 Sheets-Sheet 2.

M. A. DILLEY.

EEED MEGHANISM EOE SEWING MACHINES. No. 247,750. Patented Oet. 4,1881.`

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MARTIN A. DILLEY, OF WASEPI, MICHIGAN.

FEED MECHANIS'Ml FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 247,750, dated October4, 1881.

Applicationled July 5, 1881.

To all whom it may concern:

Be it known that I, MARTIN A. DILLEY, a citizenof the United States ofAmerica, residing at VVasepi, in the conntyoi' St. Joseph and State ofMichigan, have invented certain new and useful Improvements inSewing-Machine Feeds; and I do hereby declare the following to be afull, clear, and exact description ofthe invention, such as will enableothers skilled in the art to which it appertains to make and use K `thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

This invention has relation to improvements in sewing-machines,especially ofthatclasshaving an under feed; and its object is to provideadditional holding and feeding means above the cloth, which co-operateswith the underfeed in carrying or feeding the fabric withoutliability tocrimp or gather. It also is intended'to remove the existing difcultiesattending the sewing through seams and other thick or abrupt places in afabric.

My improvement consists in the novel construction and combination ofparts, as will be hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a perspective view of asewing-machine head and the front portion of a sewing-machine table.Fig. 2 is a front view of the sewing-machine head with the face-plate.Fig. 3 is a rear view of the face-plate. Fig. ais aperspective anddetail view of the upper-feed device. Fig. 5 is a perspective View ofthe presser-foot and upperfeed device; andFig. 6 is a perspective viewof the means for operating the upper feed.

The letter A represents the needle-bar of a sewing-machine of the commonconstruction, but having at a a recess formed for the purpose ofadmitting one of the arms of the trip, hereinafter described.

The letter B represents the presser-bar, also recessed at b for thepurpose of receiving the projecting arm of the eXtra presser -bar andfeed, so as to be acted on by the lifter of the presser-bar.

The letter C (see Fig. 6) represents my improved presser and holder,consisting of the bar c, formed at its upper end with the project- (Nomodel.)

ing arm c, and at its lower end re'enforced, substantially as shown inthe drawings. To the lower end of this bar, on the outside face of thereenforced part, is rigidly secured by an5T suitable means aplate-spring, d, the action of which constitutes the upper feedingmeans, as hereinafter stated, and to the lower end of this spring is scurr-d the presser-foot e, ot' the form substantially as shown in Fig. 4of the drawings. This foot is slotted in front for the passage of theneedle, and is formed with the heelfon its under side. The wall betweenthe needle-bar and the bar of the main presser is recessed at g, and inthis recess, pivoted to the wall, is a trip, 7l., one arm of whichengages with the upper shoulder of the recess in the needle-bar, and tothe end ot' the other arm of the trip is pivotedaconnecting-arm,,extending downward and pivoted to` the bar of the.presser and holder. The object of this device and its connection withthe presser and feed is to lift the feed as the trip engages with theneedle-bar in its downward movement.

The letter D represents a coil-spring surrounding a rod, one end ofwhich is fixed in the lower end of the presser and holder, and the otherend operates loosely in ahole through a nut iixed in the face-plate. Theoftice of this spring is to set the presser and holder ou the fabricwhen the trip disengages from the needle-bar. In the drawings thisspring is shown on the outside of the face-plate, but in this instancetheimprovements are attached to a machine of the ordinary make,employing areciprocating under feed. In manufacturing machines thespring may be provided for on the inside of the face-plate, which can beconstructed to admit a long bar, similar tothe common presser bar, andthe pressure ot' the spring regulated by a thumb-screw or other suitablemeans.

The letter E represents the presser-foot on the main presser-bar. 1t isof the usual configuration, but is formed with a slot, 7c, made largeenough to admit the free passage of the presser and feed foot e, andthat is the object of this enlarged slot.

The letter m represents a lever pivoted to the head, the office of whichis to raise the presser-foot by engaging with the projecting IOO arm cand a shoulder in the ordinary presserbar, the same movement liftingboth pressers from the fabric.

Operation As the fabric is introduced to the action of the needle, andis being fed by the under feed in the usual way, the presserfoot israised, thereby taking the pressure off; butjust before or at the timethe presser-foot rises the holding-foot drops down on the fabric andthere remains until the under feed has carried the cloth, and with itthe foot of the holder,back the length ofonestitch, the spring betweenthe bar and the foot admitting of this lnovement, and the heel of thefoot acting as a purchase, and at the same time the spring holds thefabric frmlyon theundcr feed,there by preventing any stoppage oftheupper layer of cloth or carrying ahead the under layer, both heiligcarried along simultaneously. After the material has been fed one stitchthe presser-foot drops and holds it until the under feed engages thematerial again, when the operation is repeated.

It will be observed that the object of the heelf ofthe holding-foot c isto crimp thefabric over the point of the under feed, thereby preventingstoppage or slip ofthe fabric while it is being carried along thelengthof a stitch, which is a veryimportant feature in themechanism, and thusthe advantages of the combination of the parts of an Lipper holder andpresser device and an under feed of a sewingmachine are demonstrated.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination, in a sewingmachine having a reciprocating underfeed, of an elastic holding device, a needlebar, a forcingspring, and aslotted presser-foot surrounding the holding device, said holding devicebeing actuated in its vertical movements alternately by the needle-barand the forcing-spring, substantially as described, and for thepurposeset forth.

2. The combination, iu a sewing-machine having a reciprocating underfeed, of the needle-bar form ed with the recess a, and the holder andpresser C, having at the upper end a trip, h, engaging with the uppershoulder of the recess, substantially as described.

3. In a sewingmachine of the class described, the holder or presser C,consisting of the bar c, flat spring d, and foot e, with heelf,substantially as described.

4. The holder and presser C, consisting-ot' the bar c, formed at itsupper end With the pro- 'eetiufr arm e the flats )rinfrd and foot e with4l :n 7 c a i heelf, substantially as described.

5. In a sewingmachine of the class described, the combination, with theholder and presser C, of the connecting-arm i, trip 71, attached to theupper end of the holder and presser, with needle-bar A, having therecess a, substantially as described.

In testimony whereof I aix my signature in presence of two witnesses.

MARTIN A. DILLEY.

XVitnesses:

JENNIE A. GREENE. S. E. CHASE.

